Newcastle Falcon and Scotland flanker Andrew Mower is out of the World Cup after sustaining a serious knee injury during a training session at Caloundra yesterday.

Australian-born Mower, 28, pulled up during training and was taken by Scotland team doctor James Robson to hospital in Brisbane. A scan showed he would require anterior cruciate ligament reconstruction.

Scotland manager Dougie Morgan said: "We're all saddened that Andrew's World Cup has ended in this manner. The injury is unrelated to the knee knock which prevented him from being involved in the match against Japan last weekend.

"We are considering overnight who we will call for as a replacement."

NWales coach Steve Hansen wants his team to keep control of their own destiny by defeating Tonga in Canberra on Sunday.

After an encouraging 41-10 victory over Canada last weekend, Wales will be two-thirds of the way towards a quarter-final place if they beat Tonga.

With New Zealand expected to top Pool D, Wales know that runners-up spot is guaranteed should they add Tongan and Italian scalps.

"We know that we control our own destiny if we can win our first three games," said Hansen.

"I think Tonga will throw the ball around and throw everything at us. "

Hansen has made eight changes to the starting line-up, as he utilises his squad for what is arguably Wales' easiest pool match.

Centre Iestyn Harris, the outstanding Welsh player against Canada, is among those given a breather ahead of Saturday week's crunch appointment with Italy.